Just to add to this, I'm also in the market for a whole kitchen worth of appliances and have definitely found that if you visit an independent electrical retailer they will give you by far the best price on a bundle.
Although I haven't yet placed my order, I have been dealing with Coopers in Richmond and they have undercut the lowest price I can find online (including boots appliances). They were also amazingly helpful when I waddled into the showroom at 37 weeks pregnant asking for full demonstration of range cookers, dishwashers, washing machines etc!
Would thoroughly recommend them:
http://www.coopers-stores.com/